"Remind (formerly Remind101) is a safe, free way for teachers to text message students and keep in touch with parents." ELL connections: preview background info, send images, challenges, questions, links and even an audio message to students. Help with comprehensible input of content and tasks. New feature: students can click on feedback stamps to show understanding or questions.

sentence builder

"Maptini lets you build mind maps collaboratively and take them anywhere. Build or edit maps on the Web, iPad or iPhone, and work in real time with your friends, classmates or colleagues. The maps you create or join are accessible on your account from anywhere, and changes to a map will sync and display instantly across devices. It’s a simple and intuitive tool for organizing and sharing your ideas from a lecture, a project, or a brainstorming session."